WO2004086188A2 - Lifting restrictive signaling in a block - Google Patents
Lifting restrictive signaling in a block Download PDFInfo
- Publication number
- WO2004086188A2 WO2004086188A2 PCT/US2004/008648 US2004008648W WO2004086188A2 WO 2004086188 A2 WO2004086188 A2 WO 2004086188A2 US 2004008648 W US2004008648 W US 2004008648W WO 2004086188 A2 WO2004086188 A2 WO 2004086188A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- signal information
- block
- train
- current block
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L3/00—Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal
- B61L3/16—Continuous control along the route
- B61L3/22—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning, or like safety means along the route or between vehicles or vehicle trains
- B61L23/22—Control, warning, or like safety means along the route or between vehicles or vehicle trains for controlling traffic in two directions over the same pair of rails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L3/00—Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal
- B61L3/02—Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
- B61L3/08—Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
- B61L3/12—Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
- B61L3/125—Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves using short-range radio transmission
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L2205/00—Communication or navigation systems for railway traffic
- B61L2205/04—Satellite based navigation systems, e.g. GPS
Definitions
- the invention relates to railroads generally, and more particularly to signal compliance train control methods and systems.
- ABS Automated Block Signaling
- CTC Centralized Train Control
- CBTC CBTC
- Such systems include cab signaling systems and the TRAIN SENTINELTM system available from the assignee of the present application, Quantum Engineering, Inc. Some of these systems, including the TRAIN SENTINELTM system, ensure operator compliance with signal information transmitted into the cab.
- TRAIN SENTINELTM system ensure operator compliance with signal information transmitted into the cab.
- Such block-oriented systems vary in their implementation. However, one aspect shared by several of these systems is that a restrictive signal in one block may be caused by conditions in the next block. A problem shared by such known
- What is needed is a method and apparatus that allows the lifting of a restrictive signal after a block has been entered when such restrictive signal is no longer necessary, and that allows a less restrictive signal to be recognized even after a train has passed the aforementioned wayside signal device.
- the present invention meets the aforementioned need to a great extent by providing a computerized train control system that uses signal information from a next block to change a restrictive signal in a block currently occupied by the train
- wayside signal devices transmit messages including signal information and identification information in order to allow the system to unambiguously determine that the signal information in the message corresponds to the next wayside signal device.
- Figure 1 is a schematic diagram showing a portion of train track divided into a plurality of blocks according to one known signaling method.
- Figure 2 is a logical block diagram of a train control system according to one embodiment of the invention.
- Figure 3 a flow chart of an automatic fault reporting method performed by the system of Figure 2.
- Figure 1 illustrates a traditional ABS system 10 in which a train track 20 that has been divided into three blocks 30, 40, 50 labeled "A,” “B” and “C,” respectively.
- a wayside signal 32, 42 and 52 is associated with each of the blocks 20, 40 and 50.
- the wayside signals 32, 42, 52 include colored lights to provide visual signal information to operators on trains approaching the signals.
- the signal 52 for block C 50 will be red if a train 60 is in block C 50 or if a broken rail has been detected in block C 50.
- a red signal means stop before entering the block.
- the signal 52 in block C 50 is red
- the signal 42 in block B 40 is yellow, which signifies that speed should be reduced in preparation for stopping prior to entering the next block C 50.
- the signal 32 in block A 30 will be green, which signifies no restriction is in place for that block and a train may proceed through the block at maximum authorized speed.
- the blocks are traditionally sized such that a train may be brought to a stop within one block under worst case
- the wayside signals 32, 42, 52 have the ability to transmit messages including the signal information and, preferably, an identification number to the train in addition to or in place of the colored lights
- these signals 32, 42, 52 transmit such messages in response to interrogation signals, but the invention is not so limited.
- the signals are equipped to detect the presence of a train an transmit a signal message automatically.
- a message is broadcast repeatedly regardless of whether a train is present.
- a central authority monitors the locations of trains in the system and instructs the switches 32, 42, 52 to transmit a message as the train approaches.
- Figure 2 is a logical block diagram of a train control system 100 according to an embodiment of the present invention.
- the system 100 includes a control
- control module 110 which typically, but not necessarily, includes a microprocessor.
- the control module 110 is responsible for controlling the components of the system.
- the system 100 preferably includes a positioning system 120 connected to the control module 110.
- the positioning system supplies the position (and, in some cases, the speed) of the train to the control module 110.
- the positioning system 120 can be of any type, including a global positioning system (GPS), a differential GPS, an inertial navigation system (INS), or a Loran system.
- GPS global positioning system
- INS inertial navigation system
- Loran system a Loran system.
- positioning system refers to the portion of a positioning system that is commonly located on a mobile vehicle, which may or may not comprise the entire system.
- the term “positioning system” as used herein refers to a GPS receiver and does not include the satellites that transmit information to the GPS receiver.
- a database 130 is also connected to the control module 110.
- the database 130 preferably comprises a non- volatile memory such as a hard disk, flash memory, CD-ROM or other storage device, on which data is stored. Other types of memory, including volatile memory, may also be used.
- the data stored in the database preferably includes boundaries of all blocks in the system and identification numbers for all associated signal devices.
- the data preferably also includes map data including information concerning the direction and grade of the track in the railway. By using train position information obtained from the
- control module 110 can determine its position relative to blocks in the system as well as the identification numbers of signal devices associated with those blocks.
- the control module 110 communicates with a signal devices such as device 32 associated with block A 30 (not shown in Fig. 2) through transceiver 150.
- the transceiver 150 can be configured for any type of communication, including communicating through rails and wireless communication.
- the transceiver 150 is also preferably capable of communicating with one or more dispatchers 190.
- the brake interface 160 monitors the train brakes and allows the control module 110 to activate and control the brakes to stop or slow the train when necessary.
- the pendant 170 is also connected to the control module 110.
- the pendant 170 may take the form of the operator display illustrated in co-pending U.S. application serial number 10/186,426, entitled “Train Control System and Method of Controlling a Train or Trains” filed July 2, 2002, the contents of which are hereby incorporated by reference herein.
- the pendant 170 may be used to display signals from the signal devices 32, 42, 52 to the operator and to provide other messages to the operator and receive certain inputs from the operator as will be discussed in further detail below.
- Figure 3 is a flowchart 300 illustrating operation of the control module 110 in connection with signal devices 32, 42, 52. It should be understood that the control module 110 performs steps in addition to those shown in Figure 3 to ensure that the train complies with the signals it receives from the wayside signal devices
- the control module 110 get the train's position from the positioning system 120 at step 310. Using the position reported by the positioning system, the control module then retrieves the location of the next signal device 32, 42, 52 from the database 130 at step 311. If the train is not within communication range of the next signal device 32, 42, 52 (e.g., the distance between the train's position and the location of the next signal device is less than a threshold distance) at step 312, the control module 110 gets an updated train position from the positioning system 120
- step 313 repeats step 312 until the next signal device is within range at step 313
- control module 110 sends an interrogation message, preferably containing an
- valid response means a response that includes the correct identification number for
- control module 110 warns the operator of the condition at step 316 and, unless the
- the response is stored in a temporary database at step 319 and is compared to a previously stored signal for
- the current block that is, the signal before the train entered the block
- steps 310 et seq. are repeated.
- the signal device 32, 42, 52 does not provide information as to the reason for such a red signal, the red signal cannot be safely modified, or lifted, regardless of the signal in the next block.
- a yellow signal in a block is only
- determining whether a signal is modifiable may be r more complex.
- the yellow intermediate signal is changed to green, which is the least restrictive signal.
- the signal may be changed to a less restrictive signal rather than to the least restrictive signal.
- the determination as to how to modify the signal may vary depending upon the exact nature and complexity of the signal system.
- step 324 means allowing the train to proceed as if the signal transmitted by the wayside signal device had been changed. This may be accomplished, for example, by modifying the value of the signal as reflected in the temporary database in the system 100. Causing a change in the signal actually being transmitted by the wayside signal device is not required for this step.
- the operator is notified of the change at step 326. The notification is preferably accomplished using the operator pendant 170.
- a wayside signal device is interrogated as the train approaches.
- wayside signal devices continuously or periodically transmit signal information regardless of whether a train is close enough to receive such information.
- wayside signal devices detect when a train is approaching (using, e.g., track circuits or radar detectors) and transmit signal information at that time.
- a central authority tracks movement of trains and commands the wayside signal devices to transmit the signal information when a train is approaching. Other techniques for triggering the transmission of signal information from wayside signal devices are also possible and within the scope of the invention.
- control module 110 is located on the train. It should also be noted that some or all of the functions performed by the control module 110 could be performed by a remotely located processing unit such as a processing unit located at a central dispatcher 190. In such embodiments,
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2518911A CA2518911C (en) | 2003-03-21 | 2004-03-22 | Lifting restrictive signaling in a block |
BRPI0408527-2A BRPI0408527B1 (en) | 2003-03-21 | 2004-03-22 | System and method for controlling a train |
MXPA05010101A MXPA05010101A (en) | 2003-03-21 | 2004-03-22 | Lifting restrictive signaling in a block. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/392,850 US6853888B2 (en) | 2003-03-21 | 2003-03-21 | Lifting restrictive signaling in a block |
US10/392,850 | 2003-03-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004086188A2 true WO2004086188A2 (en) | 2004-10-07 |
WO2004086188A3 WO2004086188A3 (en) | 2006-07-20 |
Family
ID=32987993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/008648 WO2004086188A2 (en) | 2003-03-21 | 2004-03-22 | Lifting restrictive signaling in a block |
Country Status (5)
Country | Link |
---|---|
US (2) | US6853888B2 (en) |
BR (1) | BRPI0408527B1 (en) |
CA (1) | CA2518911C (en) |
MX (1) | MXPA05010101A (en) |
WO (1) | WO2004086188A2 (en) |
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-
2004
- 2004-03-22 WO PCT/US2004/008648 patent/WO2004086188A2/en active Application Filing
- 2004-03-22 BR BRPI0408527-2A patent/BRPI0408527B1/en active IP Right Grant
- 2004-03-22 MX MXPA05010101A patent/MXPA05010101A/en active IP Right Grant
- 2004-03-22 CA CA2518911A patent/CA2518911C/en not_active Expired - Lifetime
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2005
- 2005-01-11 US US11/032,053 patent/US7092800B2/en active Active
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Also Published As
Publication number | Publication date |
---|---|
BRPI0408527A (en) | 2006-03-07 |
CA2518911C (en) | 2012-05-29 |
CA2518911A1 (en) | 2004-10-07 |
BRPI0408527B1 (en) | 2015-09-01 |
MXPA05010101A (en) | 2005-11-23 |
WO2004086188A3 (en) | 2006-07-20 |
US20050159860A1 (en) | 2005-07-21 |
US20040182969A1 (en) | 2004-09-23 |
US6853888B2 (en) | 2005-02-08 |
US7092800B2 (en) | 2006-08-15 |
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